Magnetic Dimer Excitations in Cs3Cr2CI9 Studied by Neutron Scattering

Bruno Leuenberger; Hans U. Güdel; Jørgen Kjems; Daniel Petitgrand; Leon Brillouin

doi:10.1021/ic00201a015

Magnetic Dimer Excitations in Cs3Cr2CI9 Studied by Neutron Scattering

Bruno Leuenberger
, Hans U. Güdel
, Jørgen Kjems
, Daniel Petitgrand
, Leon Brillouin

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

The energy dispersion of the singlet-triplet dimer excitation in Cs3Cr2CI9h as been studied by inelastic neutron scattering (INS) at temperatures down to 1.3 K. The results can be accounted for by using a completely isotropic Heisenberg Hamiltonian in the random phase approximation (RPA). Only nearest-neighbor interactions need to be considered. From the excellent fit, three exchange parameters were obtained: J = -1.75 meV (intradimer), J = -0.032 meV (interdimer, intrasublattice) and J, = -0.031 meV (interdimer,i ntersublattice). These values indicate that Cs3Cr26I9is far from ordering magnetically. The systematic variation of the exchange parameters on substitution of C1 by Br and I is discussed.

Original language	English
Journal	Inorganic Chemistry
Volume	24
Issue number	7
Pages (from-to)	1035-1038
ISSN	0020-1669
DOIs	https://doi.org/10.1021/ic00201a015
Publication status	Published - 1985

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@article{08de9f978a1f4a3dac6a36ff334ddbf8,

title = "Magnetic Dimer Excitations in Cs3Cr2CI9 Studied by Neutron Scattering",

abstract = "The energy dispersion of the singlet-triplet dimer excitation in Cs3Cr2CI9h as been studied by inelastic neutron scattering (INS) at temperatures down to 1.3 K. The results can be accounted for by using a completely isotropic Heisenberg Hamiltonian in the random phase approximation (RPA). Only nearest-neighbor interactions need to be considered. From the excellent fit, three exchange parameters were obtained: J = -1.75 meV (intradimer), J = -0.032 meV (interdimer, intrasublattice) and J, = -0.031 meV (interdimer,i ntersublattice). These values indicate that Cs3Cr26I9is far from ordering magnetically. The systematic variation of the exchange parameters on substitution of C1 by Br and I is discussed.",

author = "Bruno Leuenberger and G{\"u}del, \{Hans U.\} and J{\o}rgen Kjems and Daniel Petitgrand and Leon Brillouin",

year = "1985",

doi = "10.1021/ic00201a015",

language = "English",

volume = "24",

pages = "1035--1038",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Magnetic Dimer Excitations in Cs3Cr2CI9 Studied by Neutron Scattering

AU - Leuenberger, Bruno

AU - Güdel, Hans U.

AU - Kjems, Jørgen

AU - Petitgrand, Daniel

AU - Brillouin, Leon

PY - 1985

Y1 - 1985

N2 - The energy dispersion of the singlet-triplet dimer excitation in Cs3Cr2CI9h as been studied by inelastic neutron scattering (INS) at temperatures down to 1.3 K. The results can be accounted for by using a completely isotropic Heisenberg Hamiltonian in the random phase approximation (RPA). Only nearest-neighbor interactions need to be considered. From the excellent fit, three exchange parameters were obtained: J = -1.75 meV (intradimer), J = -0.032 meV (interdimer, intrasublattice) and J, = -0.031 meV (interdimer,i ntersublattice). These values indicate that Cs3Cr26I9is far from ordering magnetically. The systematic variation of the exchange parameters on substitution of C1 by Br and I is discussed.

AB - The energy dispersion of the singlet-triplet dimer excitation in Cs3Cr2CI9h as been studied by inelastic neutron scattering (INS) at temperatures down to 1.3 K. The results can be accounted for by using a completely isotropic Heisenberg Hamiltonian in the random phase approximation (RPA). Only nearest-neighbor interactions need to be considered. From the excellent fit, three exchange parameters were obtained: J = -1.75 meV (intradimer), J = -0.032 meV (interdimer, intrasublattice) and J, = -0.031 meV (interdimer,i ntersublattice). These values indicate that Cs3Cr26I9is far from ordering magnetically. The systematic variation of the exchange parameters on substitution of C1 by Br and I is discussed.

U2 - 10.1021/ic00201a015

DO - 10.1021/ic00201a015

M3 - Journal article

SN - 0020-1669

VL - 24

SP - 1035

EP - 1038

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 7

ER -

Magnetic Dimer Excitations in Cs3Cr2CI9 Studied by Neutron Scattering

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